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1/* Definitions for LynxOS on i386.
2 Copyright (C) 1993-2017 Free Software Foundation, Inc.
3
4This file is part of GCC.
5
6GCC is free software; you can redistribute it and/or modify
7it under the terms of the GNU General Public License as published by
8the Free Software Foundation; either version 3, or (at your option)
9any later version.
10
11GCC is distributed in the hope that it will be useful,
12but WITHOUT ANY WARRANTY; without even the implied warranty of
13MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14GNU General Public License for more details.
15
16You should have received a copy of the GNU General Public License
17along with GCC; see the file COPYING3. If not see
18<http://www.gnu.org/licenses/>. */
19
20#define TARGET_OS_CPP_BUILTINS() \
21 do \
22 { \
23 builtin_define ("__LITTLE_ENDIAN__"); \
24 builtin_define ("__x86__"); \
25 } \
26 while (0)
27
28/* The svr4 ABI for the i386 says that records and unions are returned
29 in memory. */
30
31#define DEFAULT_PCC_STRUCT_RETURN 1
32
33/* BSS_SECTION_ASM_OP gets defined i386/unix.h. */
34
35#define ASM_OUTPUT_ALIGNED_BSS(FILE, DECL, NAME, SIZE, ALIGN) \
36 asm_output_aligned_bss (FILE, DECL, NAME, SIZE, ALIGN)
37
38/* LynxOS's GDB counts the floating point registers from 16. */
39
40#undef DBX_REGISTER_NUMBER
41#define DBX_REGISTER_NUMBER(n) \
42 (TARGET_64BIT ? dbx64_register_map[n] \
43 : (n) == 0 ? 0 \
44 : (n) == 1 ? 2 \
45 : (n) == 2 ? 1 \
46 : (n) == 3 ? 3 \
47 : (n) == 4 ? 6 \
48 : (n) == 5 ? 7 \
49 : (n) == 6 ? 5 \
50 : (n) == 7 ? 4 \
51 : ((n) >= FIRST_STACK_REG && (n) <= LAST_STACK_REG) ? (int) (n) + 8 \
52 : (-1))
53
54/* A C statement to output to the stdio stream FILE an assembler
55 command to advance the location counter to a multiple of 1<<LOG
56 bytes if it is within MAX_SKIP bytes.
57
58 This is used to align code labels according to Intel recommendations. */
59
60#ifdef HAVE_GAS_MAX_SKIP_P2ALIGN
61#define ASM_OUTPUT_MAX_SKIP_ALIGN(FILE,LOG,MAX_SKIP) \
62 do { \
63 if ((LOG) != 0) { \
64 if ((MAX_SKIP) == 0) fprintf ((FILE), "\t.p2align %d\n", (LOG)); \
65 else fprintf ((FILE), "\t.p2align %d,,%d\n", (LOG), (MAX_SKIP)); \
66 } \
67 } while (0)
68#endif
69
70/* Undefine SUBTARGET_EXTRA_SPECS it is empty anyway. We define it in
71 config/lynx.h. */
72
73#undef SUBTARGET_EXTRA_SPECS
74
75/* Undefine the definition from att.h to enable our default. */
76
77#undef ASM_OUTPUT_ALIGN
78
79/* Undefine the definition from elfos.h to enable our default. */
80
81#undef PREFERRED_DEBUGGING_TYPE
82
83/* The file i386.c defines TARGET_HAVE_TLS unconditionally if
84 HAVE_AS_TLS is defined. HAVE_AS_TLS is defined as gas support for
85 TLS is detected by configure. We undefine it here. */
86
87#undef HAVE_AS_TLS
88

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